PBX phone systems often support PRI or Primary Rate Interface, T1 lines, Analog Lines or if you have a more modern PBX it may support SIP (Session Initiated Protocol). What are differences between these dedicated line services and how do you choose the right one for your application?
What Do I Need? What Does It Cost?
We strongly suggest letting a member of our technical team contact you to discuss your particular needs. That way you’ll be assured of getting the best service at the lowest cost. There are many flavors of high speed voice and data, including fractional and integrated T1 lines. Our experts can discuss the tradeoffs with you at your convenience.
Please be so kind as to tell us where you want the service located, and provide some basic contact information on the form below. Select the type of service you are most interested in. Most of the time you’ll get an instant automated quote that will give you a very good idea of what this type of service costs in your area.
|
T1-Standard
|
ISDN-PRI
|
||
|
Voice Calls Simultaneous
|
24
|
23
|
PRI uses 1ea channel for a control channel
|
|
Channeled
|
Yes
|
Yes
|
|
|
Dynamic Usage
|
No
|
Yes
|
PRI has scaleable hunt groups
|
|
Caller ID (Name and Number)
|
Yes
|
No
|
PRI has no name is sent
|
|
ANI-Automatic Number Identification
|
Yes
|
Yes
|
Number Only
|
|
Conference on Channel (Flash)
|
Yes
|
No
|
PRI must use Trunk to Trunk
|
|
Integrated Data (Internet)
|
Yes
|
Yes
|
DATA channels minus the number of voice channels assigned
|
|
Number of Phone numbers
|
24 max
|
Unlimited
|
PRI numbers are sold in groups of 20
|
|
DID Direct Inbound Dialing
|
NO
|
YES
|
PRI offer direct ring to station via 10 digit number
|
|
Phone system Configuration
|
Key or PBX
|
PBX
|
PRI must be assigned to group keys on sets
|
Dynamic Bandwidth is provided by combining local and long distance voice traffic with your data network – across a single, PRI/T1.
The Dynamic PRI can be used to carry just Voice traffic but it can also be used to support your Data (IP/Internet) traffic too! Whenever your voice lines are not in use, the bandwidth can be used to support Data/IP traffic.
A lot of customers use a Dynamic PRI to support their Voice traffic as PRIMARY and if their IP circuit (i.e. 10M) fails, the Dynamic PRI can be used for backup/Disaster Recovery to support Data/Internet traffic. Granted, the PRI will not provide any higher bandwidth than 1.5M, but at least it will provide you with data continuity so that your business can continue to have Internet connectivity until your Primary Internet circuit is restored.
If you have multiple PRI’s bonded together (i.e. 3 T1’s) then you have 4.5M (3XT1) and will have the capacity to support 4.5M worth of Internet/Data bandwidth. The maximum number of T1’s that can be bonded together is 8, to obtain a total bandwidth of 12M. To achieve more bandwidth than 12M, Ethernet or Fiber will need to be installed – which can support 10Meg to 10Gig. You also have the option to “embed” PRI’s within the Ethernet/Fiber circuit so that it supports both Voice and Data services.